JPH08163173A - Packet transmission method - Google Patents

Abstract

PURPOSE: To provide a simple packet transmission method for which routing can easily be performed and without requiring additional protocols. CONSTITUTION: A data signal is transmitted by packetizing according to a format consisting of header information including a sending origin address and an opposite address and data information of prescribed length and regulated in advance. An address consisting of a telephone number 12 and a terminal identification number 13 or 15 is used as the sending origin address and the opposite address.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data packet address setting method in computer communication for packetizing and transmitting data between computers using a communication line such as a telephone line.

[0002]

2. Description of the Related Art Up to now, an IP (Internet Protocol) address has been widely used as an address of a data packet in computer communication in which data is packetized and transmitted between computers using a communication line such as a telephone line. It was Since this IP address was specified by 4 bytes, that is, 32 bits, a 48-bit MAC (Media Access Control) that can directly identify the computer terminal.
64-bit E.trol) that identifies the address or communication terminal. A terminal identification number such as 164 address could not be used. Therefore, in order to make correspondence between the IP address and the terminal identification number, ARP (Address Resolusion
It is necessary for a user to manually set a designated IP address and to confirm the validity of the corresponding relationship, which is inconvenient for the user.

In computer communication including a personal computer, there are a plurality of packet formats used for data transmission. As an example, the operation will be described for the case of using IP packet data widely used in current computer communication. 3 to 5 show the structure of the IP packet. FIG. 3 shows an outline of the structure, and FIG. 4 shows a breakdown structure of the packet.

In FIG. 3, 41 is an IP header and 42 is an IP
The data. In FIG. 4, 43 to 48 represent the header structure of the current IP packet (version 4: IPv4) in units of 4 bytes (32 bits), 46 is a source address, and 47 is a destination address. The header length is 20 bytes when there is no option. The IP packet length is variable, and is 64 Kbytes at the maximum.

FIG. 5 shows the structure of an IP address.
In IPv4, an address is represented by 4 bytes, class A,
It is classified into B and C. In class A, the upper 1 byte means the network number, and the lower 3 bytes are the host (terminal)
Is represented. In class B, the upper 2 bytes indicate the network, the lower 2 bytes indicate the host, and in class C the upper 3
The byte indicates the network, and the lower 1 byte indicates the host.

By adopting such a hierarchical address structure, it is possible to reduce the size of the routing table in wide area network communication or facilitate broadcasting to the sub-network, but the address is limited to 4 bytes. Therefore, at the time of communication, it is necessary to associate with a 48-bit MAC address that is uniquely assigned to the terminal (or terminal port). Therefore, another protocol called ARP has been used. In addition, the IP address is set arbitrarily (within the range of addresses that have been approved by applying to the management center) independently of the MAC address, so it is necessary to set it manually for each terminal. Automatic address management There was a drawback that you couldn't.

FIG. 6 shows a format of a future IP packet (IPng) which replaces the present IP packet. Compared to IPv4 (FIG. 4), the header part other than the address is simplified and conversely the address word length is increased.
51 and 52 are header parts corresponding to 43 to 45, and 53 and 54 are source address and destination address, both of which are 4 bytes (6
4 bits). In this case, since the word length is longer than the MAC address, it can be used as an IP address. However, since the MAC address is not hierarchized, the size of the routing table becomes enormous in the transmission in the wide area network. There are drawbacks.
Incidentally, 55 is IP data.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a packet transmission source address and a destination address in computer communication in which data is packetized and transmitted between computers using a communication line such as a telephone line. It is to provide a simple packet transmission method that is easy to route and does not require an extra protocol such as ARP.

[0009]

SUMMARY OF THE INVENTION According to the present invention, packet transmission is performed in which a data signal is packetized and transmitted in accordance with a predetermined format consisting of header information including a source address and a destination address and data information of a predetermined length. The method is characterized in that an address composed of a telephone number and a terminal identification number is used as a transmission source address and a destination address.

[0010]

According to such a method of the present invention, since an address composed of a telephone number and a terminal identification number is used as a source address and a destination address, routing is easy and an extra protocol such as ARP is unnecessary. Become.

[0011]

FIG. 1 shows an address format which is an embodiment according to the present invention. As the packet structure, a packet having a long address word length such as IPng shown in FIG. 6 is assumed, and FIG. 1 shows only a source address or a destination address portion in the packet. 1A is an address word length, FIG. 1B is an example using a telephone number and a MAC address, and FIG. 1C is a telephone number and an E.I. This is an example using 164 addresses. In the figure, 11 is an identifier, 12 is a telephone number, and 13
Is a MAC address, 14 is preliminary information, and 15 is E. 164 addresses are represented.

Since a domestic telephone number has a maximum of 10 digits including the 1 digit (number 0) indicating the area code, 4 bits are allocated to the 1 digit display BCD (Binary Coded Decimal)
Even if the code is used, it can be represented by 5 bytes. Considering the international connection, even if the addition of the country code etc. is considered, it is possible to sufficiently express it within 8 bytes. Therefore, the telephone number and 6-byte MAC address or 8-byte E. A 16-byte address part can be accommodated together with a terminal identification number such as 164 address.

The identifier 11 shown in FIG. 1B is for identifying the type of address. In this example, 1 byte is occupied, but the setting can be changed according to the number of address types. Reference numeral 12 denotes a telephone number, which is mapped using the regional hierarchical structure as it is, such as a country code, area code, local area code, and local number. 13 is a 48-bit M that identifies a computer terminal (or terminal port)
The AC address, 14 is a 2-byte reserve. The MAC address includes the identification number of the manufacturer and the identification number of the device.

Reference numeral 15 in FIG. 1 (c) is an 8-byte E.D. 164 addresses. The telephone number part is shown in Figure 1.
It has the same format as (b). For example, for a terminal in Tokyo, the country code is 2 digits (number 81), the area code is 1 digit (number 3), the city code is 4 digits, and the city code is 4 digits, in order from the upper digit in 4 bits. To map. For example, "0" may be assigned to the remaining bits as a spare.

FIG. 2 shows a system configuration example of computer communication using packets according to the present invention. FIG. 2A shows a system connection configuration. Reference numerals 21 and 26 are computers, and 22 to 25 are communication nodes having a routing (IP packet relay) function. The communication node corresponds to the area code or the area code. 31 is DSU (Digital
Service Unit), which is an interface unit between a terminal and a communication line. FIG. 2B shows a layer structure, and 27
Is a physical layer, 28 is a network layer, 29 is a transport layer, and 30 is an upper layer including an application. TCP / IP is assumed as the communication protocol.

In the packet transmission according to the present invention, the relay nodes 22 to 24 on the way can transfer the packet to the next node by referring to only the out-of-city and local station numbers among the telephone numbers as the routing information. Further, at 25, it is possible to transfer to the DSU by referring to only the station number. The MAC address is referred to and transferred from the DSU to the terminal. For connection to a foreign country, refer to the country code and transfer to the node connected to the relevant international line.

As described above, the size of the routing table required in each node can be small, so that the memory size can be reduced and the high-speed routing can be realized. Furthermore, MA
C address or E. Since the terminal identification number of 164 addresses is used, the terminal can be identified by hardware without using a protocol such as ARP, and the telephone number can also be recognized by the node, so that the user (user) side
Automatic connection of devices called Plug-and-play is also possible. Therefore, there is no need for the user to set an IP address, which has the advantage of being extremely convenient. As described above, according to the present invention, since routing is facilitated, high-speed packet transmission is possible.

[0018]

As described above, according to the present invention, in computer communication, by using an address consisting of a telephone number and a terminal identification number as a source address and a destination address of a packet, routing is easy and It is possible to provide simple and high-speed packet transmission that does not require an extra protocol such as ARP.

[Brief description of drawings]

FIG. 1 is a diagram showing an address configuration of a packet which is an embodiment according to the present invention, in which (a) shows an address word length;
(B) is a diagram showing an example using a telephone number and a MAC address, (c) is a telephone number and E. It is a figure which shows the example using 164 addresses.

FIG. 2 is a diagram showing a system configuration example of computer communication using packets according to the present invention, (a) is a diagram showing a system connection configuration, and (b) is a diagram showing a layer configuration.

FIG. 3 is a diagram showing an outline of a structure of a conventional IP packet.

FIG. 4 is a diagram showing a breakdown structure of a conventional IP packet.

FIG. 5 is a diagram showing a structure of a conventional IP address.

FIG. 6 is a diagram showing a format of a future IP packet (IPng) that replaces the current IP packet.

[Explanation of symbols]

11 identifier 12 telephone number 13 MAC address 14 preliminary information 15 E. 164 address 21, 26 computer 22-25 communication node having routing (IP packet relay) function 27 physical layer 28 network layer 29 transport layer 30 upper layer including application 31, 32 DSU 41 IP header 42 IP data 43-48 Current IP packet (version 4: IP
v4) header structure 46 sender address 47 partner address 51, 52 IPng header part 53 sender address 54 partner address 55 IP data

Claims (1)

[Claims] 1. A packet transmission method for packetizing and transmitting a data signal in accordance with a pre-defined format consisting of header information including a source address and a destination address and data information of a predetermined length. A packet transmission method characterized in that an address composed of a telephone number and a terminal identification number is used as the destination address.